Subporphyrin
WebSince the first synthesis of tribenzosubporphyrine in 2006, the chemistry of subporphyrins has attracted great interest. Recently, many methods have been developed to synthesize … WebB(III) subporphyrins are the legitimate ring-contracted porphyrins consisting of three pyrroles and three meso-carbons and their chemistry has been extensively developed …
Subporphyrin
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Web1 Feb 2008 · This study has demonstrated that intramolecular energy transfer from the carbazole dendron to the subporphyrin core occurs with a high efficiency which … Web18 Nov 2010 · In all cases, intramolecular excitationenergy transfer from the subporphyrin core to the BODIPY peripheries is efficient. Depending on the presence or absence of β …
Web4 Nov 2013 · The dimer exhibits a largely perturbed absorption spectrum, a redshifted and enhanced fluorescence spectrum, higher oxidation potentials with a large potential difference between the first and second oxidation waves, and a long-lived large anisotropy of S 1 state, which show the effective conjugative interactions of the two subporphyrin units … Web2B-type subporphyrin to generate inherently chiral subporphyrin systems and reveal their structure. chiroptical property relationship. Figure 1. Structures of (a) meso-aryl-substituted subporphyrin, (b) subphthalocyanine, and (c) inherently chiral 1,2-sub-naphthalocyanines (left: C 3 symmetric isomer; right: C 1 symmetric isomer). 2.
Web30 Jul 2024 · A π-extended “earring” subporphyrin 3 was synthesized from β,β′-diiodosubporphyrin and diboryltripyrrane via a Suzuki–Miyaura coupling and following oxidation. Its Pd complex 3Pd was also synthesized and both of the compounds were fully characterized by 1 H NMR, MS and X-ray single crystal diffraction. Web26 Oct 2024 · Subporphyrins are ring-contracted porphyrins that consist of three pyrroles and three meso -carbons. B (III) subporphyrins, which feature a boron center, are known …
Web20 Feb 2024 · Despite significant interest, the chiroptical properties of subporphyrins have rarely been investigated because chiral subporphyrins are elusive. Here, inherently chiral subporphyrins are elaborated by forming a fused pyran ring at the periphery of an A2B-type meso-aryl-substituted subporphyrin. Their circular dichroism (CD) properties are largely …
WebThese rotational features of the meso-aryl substituents lead to their large influences on the electronic properties of subporphyrins, as seen for 4-nitrophenyl-substituted subporphyrin … asiaten datenWeb20 Jan 2024 · Following the same synthetic sequence, subporphyrin tetramer 8 has been synthesized, which shows a nanocage structure consisting of doubly biphenylene-bridged two meso-meso linked subporphyrins and exhibits a red-shifted Q-like absorption band and a small HOMO-LUMO gap owing to forced coplanarization by cage formation. Abstract asiaten matWeb25 Sep 2024 · Angewandte Chemie A meso-meso β-β β-β triply linked subporphyrin dimer 6 was synthesized by stepwise reductive elimination of β-to-β doubly PtII -bridged subporphyrin dimer 9. Dimer 6 was characterized by spectroscopic and electrochemical measurements, theoretical calculations, and picosecond time-resolved transient … atam methodWeb22 Feb 2024 · Subporphyrinato boron (subporphyrin) was elusive until the syntheses of tribenzosubporphine in 2006 and meso-aryl-substituted subporphyrin in 2007. These novel contracted analogues possess a 14π-electron conjugated system embedded in a bowl-shaped structure. They exhibit absorption and fluorescence … asiaten mat sartorparkenWebAn ether cleavage reaction of A2B-type subporphyrin bearing an ortho-anisyl substituent afforded a phenolate-bridged dimer. A head-to-tail structure of the dimer was unambiguously elucidated by single crystal X-ray diffraction analysis. UV-vis absorption and magnetic circular dichroism spectra indicated a minor interaction between the ... asiaten in amerikaWebThe metal-free (M{double bond, long}2H) subporphyrin molecule (1) is characterized by a low-energy intramolecular hydrogen bond (N-H⋯N) and its HOMO-LUMO energy gap is … asiaten erlangenWebSubporphyrin free bases exhibit curved bowl-like structures and distinct 14π-aromaticity. The steady-state and time-resolved spectroscopies revealed that the excited-state behaviors of the subporphyrin free bases are comparable with those of the corresponding B(III) subporphyrins. Rotational relaxation processes in the excited states have been ... asiaten glatze